Question 9 answer is 80 and for 10 it is 72 and for 11 it is 112 and for 12 it is 143
Answer:
the last one is the answer!
2(5n-2)=4(n+2)
10n-4=4n+8
6n-4=8
6n=12
n=2
If the 2 is little and on top of the a, then it's called "nine a squared."
Answer:
ㄥBEC=70；ㄥABE=160
Step-by-step explanation:
(x-5)+(3x-5)+90=180
x-5+3x-5+90=180
4x+80=180
4x=100
x=25
ㄥBEC=3*25-5=70
ㄥABE=180-(25-5)=160
